Is there an economical cell company?

I have Sprint, have had them for about 10 years actually. I have 2 additional phones on my account. My bill is $150 per month. We use approximately 250 talk minutes, free nights and weekends, texting, and data. Because I have a blackberry on my account, I can not change the plan to a lower plan. So the plan I pay for incorporates 1500 anytime minutes, we use 250. What is wrong with this picture? I have called around to change companies and Verizon is the same price monthly for less coverage then we have now. Is there an economical cell company around? Here I am out of work, trying to keep my cell in case someone wants to interview me while I am in town already, but they make it impossible to continue to pay the cell bill.